Sewer-form.



H. 0. DAVIDSON.

IEIDUUI l iD'JUl I. o, O 0 l C .C l

H. 0. DAVIDSON.

SEWER FORM.

APPLlcAloN mio SEPT. 5. 1916.

Patented June 11, 1918,

H. 0. DAVIDSON.

SEWER FORM.

APPLlcATloN FILED sEPT.5.191s.

Patented 'Junej 11, 191,8.

3 SHEETS-SHEET 3.

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H-An'nyo; DAVIDSON, or, CLEVELAND, on1o;;AssIGNonmoJrHn nxrnneumernnssnn STEELCQMPANX; OFJGLEVELAND, omo; acoRPoRATIoN-.onomd SEWER-EGEM.

Spcicationof Letters latent,

PatentediJ une 111,.

I Applicationled September 5,'1916. 'Serial No. 118,361.

T0, .alliwwm-t may, Concern.:

Be it' known, that I?, HARRYO; DAYIDSON, a, citizenfof the `United States, residing at CleV'eLanel",A in countyofCuyahoga and. State f of "Ohio, have v invented a certain new andffusefulzy vImproyement in Sewer-Forms; of Whifchvthe followingisa full; clear, and. exact description, reference/being hadto theaeompanyine drawings."

This inventionrelate's generally to sewer forms orf molds and more p'arti''zularlyl to one, intended`-jfor use inthe buildingofcirtf e; Samefprmplef-Can. be are,limitoV forms 'or-'molds forllargeszed sewers-.f t

The invention" 'may be f farther defined; as belonging tOi that ClaSSfOf" frms" 0r; .molds inwhch a plurality,@fsectioesare arranged end to: endg'to produce a form" Yor mold of ,the desiredlength, and? the Cement or 0011:- Cretethenip'oereiarnedthefSame Properly tempest eed? permitted? t0 liardnii After the .Cemenwrwncrete has Set :Seht1y, the "forni -i'sjcol'lav 'sed" from the' y'i-"nterior, Withdrawn from tige molded-sewer ands-reset for, ayrfurther'length; orV sewer forma'- tion thereby permitting: a continuous or monolithiefsewerxto'bemaden Y Y The folije'ct of'my inyention'fisxtd provide,

Ia moldj ,of-this cha-ra'cte-r;` -a novel"I con- 'struction-.of-mold orform section which can be; quickly and easilyV setup? or' collapsed,

`and another-object 1s to proyide'a vnovel Aformk of connecting-. means4v which Will-con# necttthe sections upon the' interior andi-brace tirent at their vp ,dnt (1f-.connection and still `loe readily ld'eta'c'l1alo' -le anclecoll'apsible when desired? 'f j'these objects vin -view-and certain other's'- Whichfwiill Elie-"made apparent as the descriptionlproceeds the invention consists in the Vnovel features ,of construct-ion.' and the, mannerfloE-combiningthei same and which Wli-lfli'lbe fully? described/hereinafter -andfpointedoutlin the cl`aims`.- Y

Inthe drawings Y'i'foiniing a {par-ft' ofl'this specification., Figure l is-afsecti`onal=eleva tion illustrating the manner of* collapsing thei xrings and?platesofAv the form or inold;

Fig. Qis Va-similareView.showing the Arings and plates in their expanded orf-molding positions;- F-ig.- 3`v ajflongitudinal sectional View on `the line 3-3 ofliig.l 2; Fig. @is a .detail perspective partly` insection illustrating thefmanner-- of 1-1niti1`igf lthe-ends "ofthe moldI sections by' means of' an; interior ring Fig. 5i`s a-detailperspective view-illustrating the manner of fasteningA the abutting edges-off the plates from, which the mold section is made; Fig; 6 isa detail 4perspective- View of 'thehinge'l joint. betweenY the ring'fsection; andFigsf'T, 8, Qand 10 are deta-il view-s illustrating'the' latch for uniting tlie-ring/sections, the latch/'being shown in lits open yandl closed positions, respectively.

In practice I A'preferito makel each mold. sectionl from a-pluralityof longitudinally curved plates, such plates `being 'soxcurve'd tha-tFWhen ,their longitudinal edges are -placedf together they' make a complete circular` `or` tubularI yfo-rm section.. "In the 'drawings' which I) lia- Ve chosen to illustrate one, embodiment ofrny invention-4,' lthere;` are shoyvn three curve'dplates A1; A2 and A3 which.l When-A placed togethery will make a tll'lo'ul-a'r ori-circular' forinfsection, andA for thel purpose offmalintaining these platesin' their? properposi-tionvl Il noti only locktheir meetinglfedges but also varrange interior bracinglorstrengthenng rings a't'the juncture' oftWoformfsect-ions, andfinl practice I prefer` lto make44 4theserings `sectional as 'shown consistingioflthe portions B1, and B82',- th'e portion B'beinghingedto the Yportion BL and-/Biand the portion B3 hinged tothe" end-vof B1 'at-B5. These ring. sections are-so; curved that'fWhen openedout4 and their#V free `ends connected afcomplete circular ringe Will be provided as' shown in ingk 2.

plate,KEAZand'A-has a metallic stri'p'fCWelded; or otherwise secured along oneedgethereoig and projecting beyond the edgeoftlregplate as shown. The projecting :portionof-eachstrip'ismade with a plural- 4#ity-- oiapertures,'through which headed studs 'ZD' carried near:L the' edgeof the abuttingnplate arelfadaptedim pass,'.and a latch E is pivotally*connectedl tothe plate C in line vwith leaclfr,aperture in orderv to engage the headed 'stud-as shown in Figs. '3' andl 5,V thereby securely connecting together the 'longitudinal `'edges ofthe plates. By means of this con- ;'s'truction';the three curved plates are locked alongf'theirlongitudinaledges and conStitute one section of the form or mold.

' The-sectionssoimade are arrangedl end. to

end-'andthe sectional, ringsl are arranged `at the jointfbetween two mold sections and yuponthe interior thereof for the double pur-v pose of bracing the structure at this point and uniting the mold sections. The ring sections are formed of channel iron as shown and are hinged together as previously described, the free ends of the sections B2 and B3 being cut upon a bevel, as shown at R, R', respectively, so that when the sections are opened out, these beveled ends will substantially engage each other, providing a smooth joint and, while the section B2 is swung inwardly about the center B4, it will clear the end of the section B3.

For the purpose of connecting these ends I employ a pivoted latch F which is connected to a channeled support Gr welded to the ring within the same, said latch having a notch F which is adapted to engage the headed stud H carried by a channeled support I welded in the end of the other ring section; and in order to prevent any lateral movement at this`-joint I provide Plate-s K g. upon opposite sides of the ring sections and projecting beyond the beveled ends thereof t for connecting the ends of said hinged sections, and means for connecting said yring sufficiently to overlap the joint, as most clearly shown in Figs. 1 and 2. Rings con-. structed inthis manner can be readily set'i up or collapsed as desired. ,Us yFor the purpose of uniting the end sections by means of the rings, I provide each ring section with a pair of latches L slidably connected to the ring in the channel portion thereof, and having slots L in their ends for` engagement with the headed studs M carried by the plates of the form section at each end and projecting inwardly through the ring, and it is obvious that after the latches L have been `brought into engageu ment with the headed studs M, the sections of the mold will be securely locked together and to the interior bracing ring thereby completing the construction of themoldfor form inasmuch as the plates are locked together both longitudinally and transversely and are at the same time held in their proper positions ready to have the cement or concrete poured around the exterior thereof.

When it is desired to collapse the mold, the latches L are first opened, then the latches F, and then the ring collapsed.. The plate sections can then be unlatched and drawn inwardly by means of a turn buckle N and hook rods O which engage lugs` l? attached to the interior ofthe plates; but if desired the turnbuckle can be dispensed with and the plates collapsed by discon necting them at all three points. When a turnbuckle is used it is only necessary to disconnect one plate and draw the ends of the other two plates inwardly as illustrated in Fig. 1.

After the form has been collapsed it can be withdrawn from the molded sewer, set up again in position and more cement or concrete placed about the same for the purpose of molding another portion of the sewer.

sections to the ends of the cu'rvedplates.`

By means of a device such as herein shown and described a continuous orv monolithic sewervcan be quickly and easilymolded, the mold or form being quickly and easily set up and collapsed as needed and eiectively serving its purpose as a mold when properly assembled.

Having thus described my invention, what I claim is 1. A form comprising a v plurality of curved plates and means for detacliably locking said plates together along their longitudinal edges, an interior ring composed oi' a plurality of sections hinged together, means for detacliably connecting the ends of said hinged sections, and means for connecting said ring sections to the ends of the curved plates. t n

2. A form comprising a plurality of curved plates and means for detachably locking said plates together along their `longitudinal edges, an interior ring composed of a plurality of sections hinged together, a latch 3. In a form, a ring composed of a plurality of sections hingedtogether, the end of one section having a Klaterally movable `latch connected thereto and the *tend of the opposite sectioiihaving a stud adapted to be engagedl by said latch, together with means carried byone section and adapted to engage the opposite section to prevent lateral displacement of said sections.

, 4. A form comprising ka pluralityl of curved plates and` means for` locking said plates, together along their longitudinal edges, an interior ring composed of a plurality of sections hinged-together, alatch for connecting the ends of said hinged sections, and meansy for connecting said ring sections to the curved plates.

5. A form comprisingl al plurality I of ,t

curved plates, each having a strip overlap.- ping one edge, said strip being apertured, the opposite edge of each plate having headed studs adapted to engage the apertured .strip and a latch carriedby said strip and adapted to engage said headed studfor the purpose specified. A y n 3 -1 l6. In a form, a 'ring composed ofa plu- .ralityk of sections hinged together, means carried at the endof one section and adapted to engage the opposite section to prevent .lateral displacement of said sections, and a latch carried by said positioning means and adaptedto engage a stud upon the opposite section for the purpose of locking said positioned ends together. f

7. In a form, a ring composed of `a plurality of sections hinged together, theend of onesectio-n being beveled and provided with a latch andtheend of another-section being correspondingly beveled and provided with a headed stud, and guide plates upon opposite sides of one end to prevent lateral displacement.

8. A form comprising a plurality of curved plates, each having an apertured strip along one edge and headed studs upon the opposite edge, said apertured strips carrying latches, and a ring composed of a plurality of sections hinged together, the end of one section having a latch and the end of another section having a headed stud adapted to be engaged by said latch, each ring section having a longitudinally Slotted latch adapted to engage a headedv stud carried by a plate section at the end thereof.

9. A form of the kind described comprising a plurality of curved plates, means for uniting their longitudinal edges, a sectional ring adapted to be arranged Within said plates and connected thereto, and a turnbuckle and rods connecting the plates adapted to operate as specified.

l0. A form of the kind described coin-v 11. A form comprising a plurality ofl curved plates, each carrying a'latch upon one longitudinal edge and a headed stud adjacent the opposite longitudinal edge, said curved plates being adapted to be inter,- locked to provide a form section, and a ring composed of a plurality of sections hinged together, the end of one section having a latch adapted to engage means upon the opposite meeting ring section, said ring being of a Width to overlap the joint of two form sections, said ring carrying means for engagement With fastening means carried upon the end of the section.

In testimony whereof, I hereunto affix my signature.

HARRY DAVIDSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

